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| author | Richard Kenner <kenner@gcc.gnu.org> | 1992-08-19 21:33:19 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1992-08-19 21:33:19 -0400 |
| commit | 53e33d9533dd78d7be7366f39e29f860cc18675e (patch) | |
| tree | 7db36a66325e664245bba90b76f6ea7c297c641d /gcc/combine.c | |
| parent | 674ba2d6bfd0710a72b397571afab1378c8e347a (diff) | |
| download | gcc-53e33d9533dd78d7be7366f39e29f860cc18675e.zip gcc-53e33d9533dd78d7be7366f39e29f860cc18675e.tar.gz gcc-53e33d9533dd78d7be7366f39e29f860cc18675e.tar.bz2 | |
(subst, case AND): Only make IF_THEN_ELSE if conditional moves exist.
From-SVN: r1903
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 7372e16..6729a3f 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3638,6 +3638,8 @@ subst (x, from, to, in_dest, unique_copy) goto restart; } +#ifdef HAVE_conditional_move + /* If we have (and A B) with A not an object but that is known to be -1 or 0, this is equivalent to the expression (if_then_else (ne A (const_int 0)) B (const_int 0)) @@ -3660,6 +3662,7 @@ subst (x, from, to, in_dest, unique_copy) XEXP (x, 1), const0_rtx); goto restart; } +#endif /* In the following group of tests (and those in case IOR below), we start with some combination of logical operations and apply @@ -4799,6 +4802,8 @@ force_to_mode (x, mode, bits, reg) && sub_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing) || (code == MULT && (smul_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing)) + || (code == AND + && and_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing) || (code == IOR && ior_optab->handlers[(int) mode].insn_code == CODE_FOR_nothing) || (code == XOR && (xor_optab->handlers[(int) mode].insn_code |